Who's at the Door is a compact but effective psychological horror experience that puts you in the shoes of a psychiatric patient struggling with persistent hallucinations. The game's core loop is deceptively simple: each day you check whether the hallucinations have faded-if they have, you open the door to receive medication from a visitor; if they remain, you must take the medicine by the door. Repeat this routine across eight days and the line between reality and delusion begins to shift, driving a tense, uncertain atmosphere.